[1] Whitaker made his Major League debut on October 11, 1888 at the age of 22.

In the minors in 1888, he had a 7–3 win-loss record to go with a 0.83 earned run average in 11 games started.

[2] He appeared in two games for the Orioles that season, going 1–1 with a 5.14 ERA and striking out five batters in 14 innings.

He completed all three games in which he appeared in his career, posting a 2–1 record with a 3.91 ERA.

This biographical article relating to an American baseball pitcher born in the 1860s is a stub.